Magic lantern



(No Model.) 5 Sheets-Sheet 1.

H. J. BROWER.

MAGIC LANTERN. 1 No. 399,596. "I Patented Mar. 12, 1889.

W/TNESSES INVENTOHI ATTORNEY,

N. PETERS. Phnlmumo m hcr. Washington. D. c.

5 Sheets-Sheet 2.

(No Model.)

H. J. BROWER.

MAGIC LANTERN.

Patented Mar. 12, 1889.

Ti I l INVENTORI & S S M U W 5 Sheets-Sheet 3.

(No Model.)

H. J. BROWER.

MAGIC LANTERN. [2 6.

No. 399,596. Patented Mar. 12, 1889.

INVENTOH. avwu1 I A fro/MEY- N. PETERS, Phntn-Lflhographor. Washingiwn.n. c.

(No Model.) 5 Sheets-Sheet 4.

H. J. BROWER.

MAGIC LANTERN.

No. 399,596. Patented Mar. 1 2, 1889.

WITNESSES. INVENTOH,

N PETERS. F'lwib-Lllhngraphcr. Washmglulx n.c.

5 SheetsSheet 5.

(No Model.)

H. J. BROWE R. MAGIC-LANTERN.

No. 399,596. Patented Mar. 12, 1889.

INVENTOH,

WITNESSES N PETERS. Phulo-Lilhognphcr. Wnshmgiml, n. C.

UNITED STATES PATENT OFFICE.

HENRY J. BROWVER, OF BROOKLYN, ASSIGNOR TO THOMAS H. MCALLISTER, OF NEWYORK, N. Y.

MAGIC LANTERN.

SPECIFICATION forming part of Letters Patent No. 399,596, dated March12, 1889. Application filed September 27, 1887. Serial Ito. 250,802. (Nomodel.)

To all whom it may concern.-

Be it known that I, HENRY J. BROWER, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented and produced certain new and useful Improvements inStereopticons, of which the following is aspecification, reference beinghad to the accompanying drawings, forming part thereof.

My invention relates to improvements in the manufacture ofstereopticons. Heretofore the stereopticons manufactured have been morecrude and bulky than need be; and my object in this invention is toconstruct them in such manner that they will be easily portable, andmanufacture the parts so that they may be easily and quickly puttogether for use or taken apart for transportation from place to placeas readily, and so that when packed for transportation they will occupya very small place or compass comparatively, and when set up for usethey will be as firm and rigid as if they were permanently built, whichis an important feature in instruments of this character. I attainthisobject by the manufacture and its several parts, as illustrated inthe said drawings.

The invention consists, first, in the general construction andarrangement of the parts, as hereinafter particularly described, wherebya complete stereopticon, double or single, is obtained, which can be puttogether very easily and quickly without the use of nails, ordinaryscrews, or other permanent fixtures; secondly, in the improved tubes andsliptubes, and milled-head thumb-screws for fastening the sectionstogether; thirdly, in the construction of the plates with tongues,grooves, and flanges, and the mode of applying them, so that they may beslipped in and out of position readily, and fastening them in positionin a strong and firm manner, and, fourthly, in the novel combination ofparts whereby the several objects above mentioned are attained.

In the accompanying drawings, Figure 1 is a side elevation of myimproved stereopticon; Fig. 2, a front view of the same; and Figs. 3 to8, inclusive, are plan views of the various parts of the same.

Similarletters refer to similar parts throughout the several views.

Referring now to Fig. 1, showing the side elevation of a doublestereopticon ready for use, it is the ordinary objective lens mounted 55 on standard 0. T T are the condensing-lenses, mount-ed between platesDand E, and held in position by being screwed to rim J, which is attachedto standard or plate D. The plates E and F form two sides of the hood inwhich on which all the other parts are mounted.

Z Z are milled-head thumb-screws which pass through plate (3 and screwinto the ends of tubes A and B, thus attaching plate 0 firmly to tubes Aand B. Slip-tubes Q and Q are placed on over tubes A and B, one endagainst plate 0, as shown in Fig.

The dotted lines in Fig. 2 show the shape of the upper part of plate 0.

Fig. 4 shows plate D with flanges D and D for holding the picture inposition. Spring O on flange D is for securing the picture inposition.Attached to flange D is stop N, which centers the picture in front ofplate D and in the center of the condensing-lens which is attached tothe opposite side of plate D by means of collar J, which is screwed toplate D, condensing-lenses T T being screwed into collar J. Slip-tubes Qare the same length as the thickness of the condensers and separate theplates D and E. Plate E forms 0 the front of the hood in which the lightis placed, the condensing-lenses T T being placed directly in front ofthe hole in plate E. On the inner side of plate E, and resting againstthe plate, is a sheet of mica for the protection of thecondensing-lenses from the extreme heat of the lime light. The wires E-E hold the mica in position. Slip-tubes Q are put on tubes A and B toseparate the plates E and F, making the hood the desired IOO Said post Lis fastened to plate F by he 65 size. Plate F is the last plate to puton tubes A and B. This plate forms the back of the hood, in which thelight is placed. Attached to plate F by two hinges is a sheet-metaldoor, K, which may be opened for adjusting the light inside. Attached tothe lower edge of the plate F, and in the center, is post L, on which isplaced the sleeve M. Through the two arms on the lower edge of plate Fare two screws, G and G. These screws rest in openings in acorresponding plate in the lower lantern. These screws are for elevatingthe back end of the upper lantern, so as to register the focus of thetwo lanterns or registering the pictures projected from both lanterns tothe same point on a screen some distance away. Slip-tubes Q are last puton, and milled-head screws Z and Z are then screwed into the ends oftubesA and B, which bind all the parts firmly together.

In plates E and F (shown in Figs. 7 and S) will be seen grooves X X intowhich are slipped the sheet-metal plates I and II. I forms one side ofthe hood with a door. A plate similar to I forms the other side of thehood. Sheet H forms the top of the hood, with openings between sheets IIand I at the top for the escape of heat and for ventilation.

Referring to Fig. 4, the stop N is attached to flange D on plate D bymeans of screws 1:, thereby allowing the stop N to be folded over in theopposite direction, so that it may not project beyond the plate when theinstrument is packed.

Figs. 5 and 6 show the jet or burner for burning oxygen and hydrogengases combined. The two tubes of the burner are moved forward or backthrough the sleeve M until the light is in the proper position to thecondenser, and is then fastened by means of the milled-head screw M Thesleeve M is then moved up or down on post L until the light is'directlyin the center of condensers T T, and is then fastened in position bymeans of milled -head screw M. The lime-cup Y is turned by means of aratchet with arm attached. The front end of the upper lantern is held inposition by means of pins in plate 0 (marked S and S) of the upperlantern fitting into suitable openings in the top of plate 0 of lowerlantern. The screws P P (shown in Fig. 1) and their counterpart (notshown) at the bottom corners of lower lantern are for elevating orlowering the instrument to any desired point.

I have mainly described the form of the parts of one lantern. This willsuffice, as the second or third lanterns would be exact counterpartsthereof, with the exception of the rests and fixtures shown, whichconnect one to another whenever one more lantern is added.

What I claim as my invention is- In a stereopticon, the generalcombination, with the lenses and burners, of metallic plates 0, D, E,and F, having openings and grooves, substantially as shown, tubes A andB, on which the different plates are mounted, sliptubes Q, Q, Q Q and Qfitting on over tubes A and B and separating plates 0, D, E, and F fromeach other, milled-head screws Z Z, fitting into tubes A and B, forholding the plates and tubes firmly together, post L, and sleeve M, forholding burner W in position, all substantially as and for the purposeset forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 13th day of July, 1887.

HENRY J BROWVER. lVitnesses:

EDMOND 0. BROWN, BARKLEY WYcKoFF.

